<span>C. The drought and ecological disaster of the central United States in the 1930s
The Dust Bowl describes the affect of a drought on the central americas, which led to plain fires, creation of deserts (as there was little water), as well as the effect it has on the crop market, the availablity of crops, as well as prices.
hope this helps</span>
U.S. foreign policy shifted away from "isolationism" to international involvement, since the US started to steer away from Washington's idea that it should remain as detached from foreign issues as possible.
Because hitler saw them as "unpure" races.
